nicegui/website/more_documentation/timer_documentation.py

from nicegui import ui

from ..documentation_tools import text_demo


def main_demo() -> None:
    from datetime import datetime

    label = ui.label()
    ui.timer(1.0, lambda: label.set_text(f'{datetime.now():%X}'))


def more() -> None:
    @text_demo('Activate, deactivate and cancel a timer', '''
        You can activate and deactivate a timer using the `active` property.
        You can cancel a timer using the `cancel` method.
        After canceling a timer, it cannot be activated anymore.
    ''')
    def activate_deactivate_demo():
        slider = ui.slider(min=0, max=1, value=0.5)
        timer = ui.timer(0.1, lambda: slider.set_value((slider.value + 0.01) % 1.0))
        ui.switch('active').bind_value_to(timer, 'active')
        ui.button('Cancel', on_click=timer.cancel)

    @text_demo('Call a function after a delay', '''
        You can call a function after a delay using a timer with the `once` parameter.
    ''')
    def call_after_delay_demo():
        def handle_click():
            ui.timer(1.0, lambda: ui.notify('Hi!'), once=True)
        ui.button('Notify after 1 second', on_click=handle_click)